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nand.c
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/*
* Driver for NAND support, Rick Bronson
* borrowed heavily from:
* (c) 1999 Machine Vision Holdings, Inc.
* (c) 1999, 2000 David Woodhouse <[email protected]>
*
* Ported 'dynenv' to 'nand env.oob' command
* (C) 2010 Nanometrics, Inc.
* 'dynenv' -- Dynamic environment offset in NAND OOB
* (C) Copyright 2006-2007 OpenMoko, Inc.
* Added 16-bit nand support
* (C) 2004 Texas Instruments
*
* Copyright 2010, 2012 Freescale Semiconductor
* The portions of this file whose copyright is held by Freescale and which
* are not considered a derived work of GPL v2-only code may be distributed
* and/or modified under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* The function nand_biterror() in this file is inspired from
* mtd-utils/nand-utils/nandflipbits.c which was released under GPLv2
* only
*/
#include <common.h>
#include <bootstage.h>
#include <image.h>
#include <asm/cache.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/rawnand.h>
#include <command.h>
#include <console.h>
#include <env.h>
#include <watchdog.h>
#include <malloc.h>
#include <asm/byteorder.h>
#include <jffs2/jffs2.h>
#include <nand.h>
#include "legacy-mtd-utils.h"
#if defined(CONFIG_CMD_MTDPARTS)
/* partition handling routines */
int mtdparts_init(void);
int find_dev_and_part(const char *id, struct mtd_device **dev,
u8 *part_num, struct part_info **part);
#endif
#define MAX_NUM_PAGES 64
static int nand_biterror(struct mtd_info *mtd, ulong off, int bit)
{
int ret = 0;
int page = 0;
ulong block_off;
u_char *datbuf[MAX_NUM_PAGES]; /* Data and OOB */
u_char data;
int pages_per_blk = mtd->erasesize / mtd->writesize;
struct erase_info einfo;
if (pages_per_blk > MAX_NUM_PAGES) {
printf("Too many pages in one erase block\n");
return 1;
}
if (bit < 0 || bit > 7) {
printf("bit position 0 to 7 is allowed\n");
return 1;
}
/* Allocate memory */
memset(datbuf, 0, sizeof(datbuf));
for (page = 0; page < pages_per_blk ; page++) {
datbuf[page] = malloc(mtd->writesize + mtd->oobsize);
if (!datbuf[page]) {
printf("No memory for page buffer\n");
ret = -ENOMEM;
goto free_memory;
}
}
/* Align to erase block boundary */
block_off = off & (~(mtd->erasesize - 1));
/* Read out memory as first step */
for (page = 0; page < pages_per_blk ; page++) {
struct mtd_oob_ops ops;
loff_t addr = (loff_t)block_off;
memset(&ops, 0, sizeof(ops));
ops.datbuf = datbuf[page];
ops.oobbuf = datbuf[page] + mtd->writesize;
ops.len = mtd->writesize;
ops.ooblen = mtd->oobsize;
ops.mode = MTD_OPS_RAW;
ret = mtd_read_oob(mtd, addr, &ops);
if (ret < 0) {
printf("Error (%d) reading page %08lx\n",
ret, block_off);
ret = 1;
goto free_memory;
}
block_off += mtd->writesize;
}
/* Erase the block */
memset(&einfo, 0, sizeof(einfo));
einfo.mtd = mtd;
/* Align to erase block boundary */
einfo.addr = (loff_t)(off & (~(mtd->erasesize - 1)));
einfo.len = mtd->erasesize;
ret = mtd_erase(mtd, &einfo);
if (ret < 0) {
printf("Error (%d) nand_erase_nand page %08llx\n",
ret, einfo.addr);
ret = 1;
goto free_memory;
}
/* Twist a bit in data part */
block_off = off & (mtd->erasesize - 1);
data = datbuf[block_off / mtd->writesize][block_off % mtd->writesize];
data ^= (1 << bit);
datbuf[block_off / mtd->writesize][block_off % mtd->writesize] = data;
printf("Flip data at 0x%lx with xor 0x%02x (bit=%d) to value=0x%02x\n",
off, (1 << bit), bit, data);
/* Write back twisted data and unmodified OOB */
/* Align to erase block boundary */
block_off = off & (~(mtd->erasesize - 1));
for (page = 0; page < pages_per_blk; page++) {
struct mtd_oob_ops ops;
loff_t addr = (loff_t)block_off;
memset(&ops, 0, sizeof(ops));
ops.datbuf = datbuf[page];
ops.oobbuf = datbuf[page] + mtd->writesize;
ops.len = mtd->writesize;
ops.ooblen = mtd->oobsize;
ops.mode = MTD_OPS_RAW;
ret = mtd_write_oob(mtd, addr, &ops);
if (ret < 0) {
printf("Error (%d) write page %08lx\n", ret, block_off);
ret = 1;
goto free_memory;
}
block_off += mtd->writesize;
}
free_memory:
for (page = 0; page < pages_per_blk ; page++) {
if (datbuf[page])
free(datbuf[page]);
}
return ret;
}
static int nand_dump(struct mtd_info *mtd, ulong off, int only_oob,
int repeat)
{
int i;
u_char *datbuf, *oobbuf, *p;
static loff_t last;
int ret = 0;
if (repeat)
off = last + mtd->writesize;
last = off;
datbuf = memalign(ARCH_DMA_MINALIGN, mtd->writesize);
if (!datbuf) {
puts("No memory for page buffer\n");
return 1;
}
oobbuf = memalign(ARCH_DMA_MINALIGN, mtd->oobsize);
if (!oobbuf) {
puts("No memory for page buffer\n");
ret = 1;
goto free_dat;
}
off &= ~(mtd->writesize - 1);
loff_t addr = (loff_t) off;
struct mtd_oob_ops ops;
memset(&ops, 0, sizeof(ops));
ops.datbuf = datbuf;
ops.oobbuf = oobbuf;
ops.len = mtd->writesize;
ops.ooblen = mtd->oobsize;
ops.mode = MTD_OPS_RAW;
i = mtd_read_oob(mtd, addr, &ops);
if (i < 0) {
printf("Error (%d) reading page %08lx\n", i, off);
ret = 1;
goto free_all;
}
printf("Page %08lx dump:\n", off);
if (!only_oob) {
i = mtd->writesize >> 4;
p = datbuf;
while (i--) {
printf("\t%02x %02x %02x %02x %02x %02x %02x %02x"
" %02x %02x %02x %02x %02x %02x %02x %02x\n",
p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7],
p[8], p[9], p[10], p[11], p[12], p[13], p[14],
p[15]);
p += 16;
}
}
puts("OOB:\n");
i = mtd->oobsize >> 3;
p = oobbuf;
while (i--) {
printf("\t%02x %02x %02x %02x %02x %02x %02x %02x\n",
p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
p += 8;
}
free_all:
free(oobbuf);
free_dat:
free(datbuf);
return ret;
}
/* ------------------------------------------------------------------------- */
static int set_dev(int dev)
{
struct mtd_info *mtd = get_nand_dev_by_index(dev);
if (!mtd)
return -ENODEV;
if (nand_curr_device == dev)
return 0;
printf("Device %d: %s", dev, mtd->name);
puts("... is now current device\n");
nand_curr_device = dev;
#ifdef CONFIG_SYS_NAND_SELECT_DEVICE
board_nand_select_device(mtd_to_nand(mtd), dev);
#endif
return 0;
}
#ifdef CONFIG_CMD_NAND_LOCK_UNLOCK
static void print_status(ulong start, ulong end, ulong erasesize, int status)
{
/*
* Micron NAND flash (e.g. MT29F4G08ABADAH4) BLOCK LOCK READ STATUS is
* not the same as others. Instead of bit 1 being lock, it is
* #lock_tight. To make the driver support either format, ignore bit 1
* and use only bit 0 and bit 2.
*/
printf("%08lx - %08lx: %08lx blocks %s%s%s\n",
start,
end - 1,
(end - start) / erasesize,
((status & NAND_LOCK_STATUS_TIGHT) ? "TIGHT " : ""),
(!(status & NAND_LOCK_STATUS_UNLOCK) ? "LOCK " : ""),
((status & NAND_LOCK_STATUS_UNLOCK) ? "UNLOCK " : ""));
}
static void do_nand_status(struct mtd_info *mtd)
{
ulong block_start = 0;
ulong off;
int last_status = -1;
struct nand_chip *nand_chip = mtd_to_nand(mtd);
/* check the WP bit */
nand_chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1);
printf("device is %swrite protected\n",
(nand_chip->read_byte(mtd) & 0x80 ?
"NOT " : ""));
for (off = 0; off < mtd->size; off += mtd->erasesize) {
int s = nand_get_lock_status(mtd, off);
/* print message only if status has changed */
if (s != last_status && off != 0) {
print_status(block_start, off, mtd->erasesize,
last_status);
block_start = off;
}
last_status = s;
}
/* Print the last block info */
print_status(block_start, off, mtd->erasesize, last_status);
}
#endif
#ifdef CONFIG_ENV_OFFSET_OOB
unsigned long nand_env_oob_offset;
int do_nand_env_oob(struct cmd_tbl *cmdtp, int argc, char *const argv[])
{
int ret;
uint32_t oob_buf[ENV_OFFSET_SIZE/sizeof(uint32_t)];
struct mtd_info *mtd = get_nand_dev_by_index(0);
char *cmd = argv[1];
if (CONFIG_SYS_MAX_NAND_DEVICE == 0 || !mtd) {
puts("no devices available\n");
return 1;
}
set_dev(0);
if (!strcmp(cmd, "get")) {
ret = get_nand_env_oob(mtd, &nand_env_oob_offset);
if (ret)
return 1;
printf("0x%08lx\n", nand_env_oob_offset);
} else if (!strcmp(cmd, "set")) {
loff_t addr;
loff_t maxsize;
struct mtd_oob_ops ops;
int idx = 0;
if (argc < 3)
goto usage;
mtd = get_nand_dev_by_index(idx);
/* We don't care about size, or maxsize. */
if (mtd_arg_off(argv[2], &idx, &addr, &maxsize, &maxsize,
MTD_DEV_TYPE_NAND, mtd->size)) {
puts("Offset or partition name expected\n");
return 1;
}
if (set_dev(idx)) {
puts("Offset or partition name expected\n");
return 1;
}
if (idx != 0) {
puts("Partition not on first NAND device\n");
return 1;
}
if (mtd->oobavail < ENV_OFFSET_SIZE) {
printf("Insufficient available OOB bytes:\n"
"%d OOB bytes available but %d required for "
"env.oob support\n",
mtd->oobavail, ENV_OFFSET_SIZE);
return 1;
}
if ((addr & (mtd->erasesize - 1)) != 0) {
printf("Environment offset must be block-aligned\n");
return 1;
}
ops.datbuf = NULL;
ops.mode = MTD_OOB_AUTO;
ops.ooboffs = 0;
ops.ooblen = ENV_OFFSET_SIZE;
ops.oobbuf = (void *) oob_buf;
oob_buf[0] = ENV_OOB_MARKER;
oob_buf[1] = addr / mtd->erasesize;
ret = mtd->write_oob(mtd, ENV_OFFSET_SIZE, &ops);
if (ret) {
printf("Error writing OOB block 0\n");
return ret;
}
ret = get_nand_env_oob(mtd, &nand_env_oob_offset);
if (ret) {
printf("Error reading env offset in OOB\n");
return ret;
}
if (addr != nand_env_oob_offset) {
printf("Verification of env offset in OOB failed: "
"0x%08llx expected but got 0x%08lx\n",
(unsigned long long)addr, nand_env_oob_offset);
return 1;
}
} else {
goto usage;
}
return ret;
usage:
return CMD_RET_USAGE;
}
#endif
static void nand_print_and_set_info(int idx)
{
struct mtd_info *mtd;
struct nand_chip *chip;
mtd = get_nand_dev_by_index(idx);
if (!mtd)
return;
chip = mtd_to_nand(mtd);
printf("Device %d: ", idx);
if (chip->numchips > 1)
printf("%dx ", chip->numchips);
printf("%s, sector size %u KiB\n",
mtd->name, mtd->erasesize >> 10);
printf(" Page size %8d b\n", mtd->writesize);
printf(" OOB size %8d b\n", mtd->oobsize);
printf(" Erase size %8d b\n", mtd->erasesize);
printf(" subpagesize %8d b\n", chip->subpagesize);
printf(" options 0x%08x\n", chip->options);
printf(" bbt options 0x%08x\n", chip->bbt_options);
/* Set geometry info */
env_set_hex("nand_writesize", mtd->writesize);
env_set_hex("nand_oobsize", mtd->oobsize);
env_set_hex("nand_erasesize", mtd->erasesize);
}
static int raw_access(struct mtd_info *mtd, ulong addr, loff_t off,
ulong count, int read, int no_verify)
{
int ret = 0;
while (count--) {
/* Raw access */
mtd_oob_ops_t ops = {
.datbuf = (u8 *)addr,
.oobbuf = ((u8 *)addr) + mtd->writesize,
.len = mtd->writesize,
.ooblen = mtd->oobsize,
.mode = MTD_OPS_RAW
};
if (read) {
ret = mtd_read_oob(mtd, off, &ops);
} else {
ret = mtd_write_oob(mtd, off, &ops);
if (!ret && !no_verify)
ret = nand_verify_page_oob(mtd, &ops, off);
}
if (ret) {
printf("%s: error at offset %llx, ret %d\n",
__func__, (long long)off, ret);
break;
}
addr += mtd->writesize + mtd->oobsize;
off += mtd->writesize;
}
return ret;
}
/* Adjust a chip/partition size down for bad blocks so we don't
* read/write past the end of a chip/partition by accident.
*/
static void adjust_size_for_badblocks(loff_t *size, loff_t offset, int dev)
{
/* We grab the nand info object here fresh because this is usually
* called after arg_off_size() which can change the value of dev.
*/
struct mtd_info *mtd = get_nand_dev_by_index(dev);
loff_t maxoffset = offset + *size;
int badblocks = 0;
/* count badblocks in NAND from offset to offset + size */
for (; offset < maxoffset; offset += mtd->erasesize) {
if (nand_block_isbad(mtd, offset))
badblocks++;
}
/* adjust size if any bad blocks found */
if (badblocks) {
*size -= badblocks * mtd->erasesize;
printf("size adjusted to 0x%llx (%d bad blocks)\n",
(unsigned long long)*size, badblocks);
}
}
static int do_nand(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
int i, ret = 0;
ulong addr;
loff_t off, size, maxsize;
char *cmd, *s;
struct mtd_info *mtd;
#ifdef CONFIG_SYS_NAND_QUIET
int quiet = CONFIG_SYS_NAND_QUIET;
#else
int quiet = 0;
#endif
const char *quiet_str = env_get("quiet");
int dev = nand_curr_device;
int repeat = flag & CMD_FLAG_REPEAT;
/* at least two arguments please */
if (argc < 2)
goto usage;
if (quiet_str)
quiet = simple_strtoul(quiet_str, NULL, 0) != 0;
cmd = argv[1];
/* Only "dump" is repeatable. */
if (repeat && strcmp(cmd, "dump"))
return 0;
if (strcmp(cmd, "info") == 0) {
putc('\n');
for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++)
nand_print_and_set_info(i);
return 0;
}
if (strcmp(cmd, "device") == 0) {
if (argc < 3) {
putc('\n');
if (dev < 0 || dev >= CONFIG_SYS_MAX_NAND_DEVICE)
puts("no devices available\n");
else
nand_print_and_set_info(dev);
return 0;
}
dev = (int)dectoul(argv[2], NULL);
set_dev(dev);
return 0;
}
#ifdef CONFIG_ENV_OFFSET_OOB
/* this command operates only on the first nand device */
if (strcmp(cmd, "env.oob") == 0)
return do_nand_env_oob(cmdtp, argc - 1, argv + 1);
#endif
/* The following commands operate on the current device, unless
* overridden by a partition specifier. Note that if somehow the
* current device is invalid, it will have to be changed to a valid
* one before these commands can run, even if a partition specifier
* for another device is to be used.
*/
mtd = get_nand_dev_by_index(dev);
if (!mtd) {
puts("\nno devices available\n");
return 1;
}
if (strcmp(cmd, "bad") == 0) {
printf("\nDevice %d bad blocks:\n", dev);
for (off = 0; off < mtd->size; off += mtd->erasesize)
if (nand_block_isbad(mtd, off))
printf(" %08llx\n", (unsigned long long)off);
return 0;
}
/*
* Syntax is:
* 0 1 2 3 4
* nand erase [clean] [off size]
*/
if (strncmp(cmd, "erase", 5) == 0 || strncmp(cmd, "scrub", 5) == 0) {
nand_erase_options_t opts;
/* "clean" at index 2 means request to write cleanmarker */
int clean = argc > 2 && !strcmp("clean", argv[2]);
int scrub_yes = argc > 2 && !strcmp("-y", argv[2]);
int o = (clean || scrub_yes) ? 3 : 2;
int scrub = !strncmp(cmd, "scrub", 5);
int spread = 0;
int args = 2;
const char *scrub_warn =
"Warning: "
"scrub option will erase all factory set bad blocks!\n"
" "
"There is no reliable way to recover them.\n"
" "
"Use this command only for testing purposes if you\n"
" "
"are sure of what you are doing!\n"
"\nReally scrub this NAND flash? <y/N>\n";
if (cmd[5] != 0) {
if (!strcmp(&cmd[5], ".spread")) {
spread = 1;
} else if (!strcmp(&cmd[5], ".part")) {
args = 1;
} else if (!strcmp(&cmd[5], ".chip")) {
args = 0;
} else {
goto usage;
}
}
/*
* Don't allow missing arguments to cause full chip/partition
* erases -- easy to do accidentally, e.g. with a misspelled
* variable name.
*/
if (argc != o + args)
goto usage;
printf("\nNAND %s: ", cmd);
/* skip first two or three arguments, look for offset and size */
if (mtd_arg_off_size(argc - o, argv + o, &dev, &off, &size,
&maxsize, MTD_DEV_TYPE_NAND,
mtd->size) != 0)
return 1;
if (set_dev(dev))
return 1;
mtd = get_nand_dev_by_index(dev);
memset(&opts, 0, sizeof(opts));
opts.offset = off;
opts.length = size;
opts.jffs2 = clean;
opts.quiet = quiet;
opts.spread = spread;
if (scrub) {
if (scrub_yes) {
opts.scrub = 1;
} else {
puts(scrub_warn);
if (confirm_yesno()) {
opts.scrub = 1;
} else {
puts("scrub aborted\n");
return 1;
}
}
}
ret = nand_erase_opts(mtd, &opts);
printf("%s\n", ret ? "ERROR" : "OK");
return ret == 0 ? 0 : 1;
}
if (strncmp(cmd, "dump", 4) == 0) {
if (argc < 3)
goto usage;
off = (int)hextoul(argv[2], NULL);
ret = nand_dump(mtd, off, !strcmp(&cmd[4], ".oob"), repeat);
return ret == 0 ? 1 : 0;
}
if (strncmp(cmd, "read", 4) == 0 || strncmp(cmd, "write", 5) == 0) {
size_t rwsize;
ulong pagecount = 1;
int read;
int raw = 0;
int no_verify = 0;
if (argc < 4)
goto usage;
addr = (ulong)hextoul(argv[2], NULL);
read = strncmp(cmd, "read", 4) == 0; /* 1 = read, 0 = write */
printf("\nNAND %s: ", read ? "read" : "write");
s = strchr(cmd, '.');
if (s && !strncmp(s, ".raw", 4)) {
raw = 1;
if (!strcmp(s, ".raw.noverify"))
no_verify = 1;
if (mtd_arg_off(argv[3], &dev, &off, &size, &maxsize,
MTD_DEV_TYPE_NAND,
mtd->size))
return 1;
if (set_dev(dev))
return 1;
mtd = get_nand_dev_by_index(dev);
if (argc > 4 && !str2long(argv[4], &pagecount)) {
printf("'%s' is not a number\n", argv[4]);
return 1;
}
if (pagecount * mtd->writesize > size) {
puts("Size exceeds partition or device limit\n");
return -1;
}
rwsize = pagecount * (mtd->writesize + mtd->oobsize);
} else {
if (mtd_arg_off_size(argc - 3, argv + 3, &dev, &off,
&size, &maxsize,
MTD_DEV_TYPE_NAND,
mtd->size) != 0)
return 1;
if (set_dev(dev))
return 1;
/* size is unspecified */
if (argc < 5)
adjust_size_for_badblocks(&size, off, dev);
rwsize = size;
}
mtd = get_nand_dev_by_index(dev);
if (!s || !strcmp(s, ".jffs2") ||
!strcmp(s, ".e") || !strcmp(s, ".i")) {
if (read)
ret = nand_read_skip_bad(mtd, off, &rwsize,
NULL, maxsize,
(u_char *)addr);
else
ret = nand_write_skip_bad(mtd, off, &rwsize,
NULL, maxsize,
(u_char *)addr,
WITH_WR_VERIFY);
#ifdef CONFIG_CMD_NAND_TRIMFFS
} else if (!strcmp(s, ".trimffs")) {
if (read) {
printf("Unknown nand command suffix '%s'\n", s);
return 1;
}
ret = nand_write_skip_bad(mtd, off, &rwsize, NULL,
maxsize, (u_char *)addr,
WITH_DROP_FFS | WITH_WR_VERIFY);
#endif
} else if (!strcmp(s, ".oob")) {
/* out-of-band data */
mtd_oob_ops_t ops = {
.oobbuf = (u8 *)addr,
.ooblen = rwsize,
.mode = MTD_OPS_RAW
};
if (read)
ret = mtd_read_oob(mtd, off, &ops);
else
ret = mtd_write_oob(mtd, off, &ops);
} else if (raw) {
ret = raw_access(mtd, addr, off, pagecount, read,
no_verify);
} else {
printf("Unknown nand command suffix '%s'.\n", s);
return 1;
}
printf(" %zu bytes %s: %s\n", rwsize,
read ? "read" : "written", ret ? "ERROR" : "OK");
return ret == 0 ? 0 : 1;
}
#ifdef CONFIG_CMD_NAND_TORTURE
if (strcmp(cmd, "torture") == 0) {
loff_t endoff;
unsigned int failed = 0, passed = 0;
if (argc < 3)
goto usage;
if (!str2off(argv[2], &off)) {
puts("Offset is not a valid number\n");
return 1;
}
size = mtd->erasesize;
if (argc > 3) {
if (!str2off(argv[3], &size)) {
puts("Size is not a valid number\n");
return 1;
}
}
endoff = off + size;
if (endoff > mtd->size) {
puts("Arguments beyond end of NAND\n");
return 1;
}
off = round_down(off, mtd->erasesize);
endoff = round_up(endoff, mtd->erasesize);
size = endoff - off;
printf("\nNAND torture: device %d offset 0x%llx size 0x%llx (block size 0x%x)\n",
dev, off, size, mtd->erasesize);
while (off < endoff) {
ret = nand_torture(mtd, off);
if (ret) {
failed++;
printf(" block at 0x%llx failed\n", off);
} else {
passed++;
}
off += mtd->erasesize;
}
printf(" Passed: %u, failed: %u\n", passed, failed);
return failed != 0;
}
#endif
if (strcmp(cmd, "markbad") == 0) {
argc -= 2;
argv += 2;
if (argc <= 0)
goto usage;
while (argc > 0) {
addr = hextoul(*argv, NULL);
if (mtd_block_markbad(mtd, addr)) {
printf("block 0x%08lx NOT marked "
"as bad! ERROR %d\n",
addr, ret);
ret = 1;
} else {
printf("block 0x%08lx successfully "
"marked as bad\n",
addr);
}
--argc;
++argv;
}
return ret;
}
if (strcmp(cmd, "biterr") == 0) {
int bit;
if (argc != 4)
goto usage;
off = (int)simple_strtoul(argv[2], NULL, 16);
bit = (int)simple_strtoul(argv[3], NULL, 10);
ret = nand_biterror(mtd, off, bit);
return ret;
}
#ifdef CONFIG_CMD_NAND_LOCK_UNLOCK
if (strcmp(cmd, "lock") == 0) {
int tight = 0;
int status = 0;
if (argc == 3) {
if (!strcmp("tight", argv[2]))
tight = 1;
if (!strcmp("status", argv[2]))
status = 1;
}
if (status) {
do_nand_status(mtd);
} else {
if (!nand_lock(mtd, tight)) {
puts("NAND flash successfully locked\n");
} else {
puts("Error locking NAND flash\n");
return 1;
}
}
return 0;
}
if (strncmp(cmd, "unlock", 5) == 0) {
int allexcept = 0;
s = strchr(cmd, '.');
if (s && !strcmp(s, ".allexcept"))
allexcept = 1;
if (mtd_arg_off_size(argc - 2, argv + 2, &dev, &off, &size,
&maxsize, MTD_DEV_TYPE_NAND,
mtd->size) < 0)
return 1;
if (set_dev(dev))
return 1;
mtd = get_nand_dev_by_index(dev);
if (!nand_unlock(mtd, off, size, allexcept)) {
puts("NAND flash successfully unlocked\n");
} else {
puts("Error unlocking NAND flash, "
"write and erase will probably fail\n");
return 1;
}
return 0;
}
#endif
usage:
return CMD_RET_USAGE;
}
#ifdef CONFIG_SYS_LONGHELP
static char nand_help_text[] =
"info - show available NAND devices\n"
"nand device [dev] - show or set current device\n"
"nand read - addr off|partition size\n"
"nand write - addr off|partition size\n"
" read/write 'size' bytes starting at offset 'off'\n"
" to/from memory address 'addr', skipping bad blocks.\n"
"nand read.raw - addr off|partition [count]\n"
"nand write.raw[.noverify] - addr off|partition [count]\n"
" Use read.raw/write.raw to avoid ECC and access the flash as-is.\n"
#ifdef CONFIG_CMD_NAND_TRIMFFS
"nand write.trimffs - addr off|partition size\n"
" write 'size' bytes starting at offset 'off' from memory address\n"
" 'addr', skipping bad blocks and dropping any pages at the end\n"
" of eraseblocks that contain only 0xFF\n"
#endif
"nand erase[.spread] [clean] off size - erase 'size' bytes "
"from offset 'off'\n"
" With '.spread', erase enough for given file size, otherwise,\n"
" 'size' includes skipped bad blocks.\n"
"nand erase.part [clean] partition - erase entire mtd partition'\n"
"nand erase.chip [clean] - erase entire chip'\n"
"nand bad - show bad blocks\n"
"nand dump[.oob] off - dump page\n"
#ifdef CONFIG_CMD_NAND_TORTURE
"nand torture off - torture one block at offset\n"
"nand torture off [size] - torture blocks from off to off+size\n"
#endif
"nand scrub [-y] off size | scrub.part partition | scrub.chip\n"
" really clean NAND erasing bad blocks (UNSAFE)\n"
"nand markbad off [...] - mark bad block(s) at offset (UNSAFE)\n"
"nand biterr off bit - make a bit error at offset and bit position (UNSAFE)"
#ifdef CONFIG_CMD_NAND_LOCK_UNLOCK
"\n"
"nand lock [tight] [status]\n"
" bring nand to lock state or display locked pages\n"
"nand unlock[.allexcept] [offset] [size] - unlock section"
#endif
#ifdef CONFIG_ENV_OFFSET_OOB
"\n"
"nand env.oob - environment offset in OOB of block 0 of"
" first device.\n"
"nand env.oob set off|partition - set enviromnent offset\n"
"nand env.oob get - get environment offset"
#endif
"";
#endif
U_BOOT_CMD(
nand, CONFIG_SYS_MAXARGS, 1, do_nand,
"NAND sub-system", nand_help_text
);
static int nand_load_image(struct cmd_tbl *cmdtp, struct mtd_info *mtd,
ulong offset, ulong addr, char *cmd)
{
int r;
char *s;
size_t cnt;
#if defined(CONFIG_LEGACY_IMAGE_FORMAT)
image_header_t *hdr;
#endif
#if defined(CONFIG_FIT)
const void *fit_hdr = NULL;
#endif
s = strchr(cmd, '.');
if (s != NULL &&
(strcmp(s, ".jffs2") && strcmp(s, ".e") && strcmp(s, ".i"))) {
printf("Unknown nand load suffix '%s'\n", s);
bootstage_error(BOOTSTAGE_ID_NAND_SUFFIX);
return 1;
}
printf("\nLoading from %s, offset 0x%lx\n", mtd->name, offset);
cnt = mtd->writesize;
r = nand_read_skip_bad(mtd, offset, &cnt, NULL, mtd->size,
(u_char *)addr);
if (r) {
puts("** Read error\n");
bootstage_error(BOOTSTAGE_ID_NAND_HDR_READ);
return 1;